Abstract
When looking in detail at analyses of the tribological load-carrying capacity of lubricants, it becomes apparent that an exclusive evaluation of the evolution of the coefficient of friction alone cannot provide any sufficient criteria for determining the occurrence of adhesive failure. For this reason, extending the knowledge base by combining several criteria in order to draw a clearer picture of adhesive wear mechanisms is urgently required. This can be achieved by combining the evolution of coefficient of friction with stroke signals and/or the electrical contact resistance and/or contact temperature and/or acoustic emission and/or stroke zero position, frictional power input and further derived parameters.
Highlights
The tribological load-carrying capacity of lubricants is defined on the translatory oscillation tribometer (SRV; abbreviation from German: Schwingung, Reibung, Verschleiss) by load step tests under the regime of mixed/boundary lubrication with standardised processes and parameters according to ASTM standards D5706 [1] and D7421 [2] or as ISO 19291:2016-12 homologues
The new measurements combined with the evolution of the coefficient of friction can be used in different significance as further interpretation tools in seizure load step tests
The new measurements combined with the evolution of the coefficient of friction can be used in different significance as further interpretation tools in seizure load step tests for the identification and/or confirmation of adhesive wear mechanisms
Summary
Wear in Load Step Tests on the Translatory Oscillation Tribometer. Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. The tribological load-carrying capacity of lubricants is defined on the translatory oscillation tribometer (SRV; abbreviation from German: Schwingung, Reibung, Verschleiss) by load step tests under the regime of mixed/boundary lubrication with standardised processes and parameters according to ASTM standards D5706 [1] and D7421 [2] or as ISO 19291:2016-12 homologues This includes the increase in normal force in constant increments until the lubricant cannot prevent the movement of friction components and adhesive failure occurs or the tribometer specific maximum load of generally 2000 N (2500 N) is reached. Besides the us Within the scope of the test methods, lubricants, which served as samples tested in operating conditions and measurements, such as normal force, temperature, frequen international SRV round robin tests, were subject to the tribological load-carrying capacity stroke and coefficient of friction, further quantities were for recorded for lubricated interpretation: e test according to ASTM D5706 for greases and/or.
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